Harrow



(No Model.)

11a/hud Aug. 3, 1886.

HARROW.

. S. A. GRAHAM.

weaves.- [g//l//W /J-WQQMW,

@ZM/JM@ UNITED STATES Aram* Brien.

HARROW.

SPECIFICATION forming part of Letters Patent No. 346,744, dated August3, 1886. Application led August 7', 1885. Serial No; 174,048. (Nomodel.)

T0 all whom it may concern.-

Be it known that LWILLIAM S. A. GRAHAM, a citizen of the United States,and a resident of Lancaster, in the county of Grant and State oflVisconsin, have invented certain new and useful Improvements inHarrows; and kI do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilledin the art to which it appertains to make and use the same, referencebeinghad to the accompanying drawings, which form a part of thisspecification.

My invention relates to that class of harrows which arc constructed withpivoted tootlrbars which are flexibly or movably connected together; andit consists in the improved construction, arrangement, and combinationof parts of a harrow of this class, in which the tooth-bars may be adjusted at any desired angle and secured in their adjusted position bymeans-of the improved mechanism which will be hereinafter fullydescribed and claimed.

Referring to the annexed drawings, Figure 1 is a perspective view of myimproved adjustable harrow, and Fig. 2 is a sectional detail view taken011 line x ar, Fig. 1.

The same letters of reference indicate corresponding parts in both thefigures.

Referring to thc several parts by letter, A A represent the transversetooth-bars, the ends of which are rounded, and have preferably a smoothmetal band, B, shrunk tightly on them, as shown, while a looser metalbander collar,` C, is placed upon the rounded ends of the tooth-bars,encircling the tight band B, and being held in place on the ends of thebars by ymeans of pins c. These collars C (which are of such a size asto adapt them to turn readily on the ends of the tooth-bars) are formedon diametrically-opposite sides with projecting` lugs D, havingperforations'D, and the ends of the several tooth`bars are connectedmovably together by rods E, having hooks E formed at cach of their ends,which are inserted or hooked through the perforated lugs D, thisarrangement serving to connect the several tooth-bars securely, yetmovably, together.

F F represent short posts, which are bifurcated at their lower ends toadapt them to be secured rigidly in a-vertical position to the lends ofthe vertical central posts together, as

H indicates the operating or adjusting lever, the lower endof which isbifurcated, to permit of thelever being secured rigidlyin averticalposition to the center of the rear tooth-bar of the harrow, the leverbeing provided above its bifurcated lower portion with a series oftransverse perforations, H', in any one of which may be hooked the rearhooked end of the coupling-rod which connects the lever with the top ofthe vertical post on the tooth-bar which is next to the rear bar.

I indicates a long adjusting-bar, the rear bifurcated end of which ismovably secured by means of collars I', secured to the said ends, to thecentral portionv of the first or forward tooth-bar of the harrow, theadj Listing-'bar bel ing supported upon the upper side of the toothbarnext to it, over which it passes, and its rear end, which is provided onthe upper edge"v with al series of notches, l2, extending againsttheside of the lever H on the rear tooth-bar, so that the said notchesmay be engaged by a spring-actuated catch, .T secu red upon the side ofthesaid lever.

From the foregoing description, taken in connection with theaccompanying drawings, the construction of my improved harrow will bereadily understood. To incline the harrowteeth backward, all that isnecessary is to take the upper end of the lever in the hand, and, bypressing the upper end of the handle of the spring-actuated catch,release the catch from the notch l2 in. which it may be resting, whenthe lever is thrown forward, thereby, through the links G, connectingthe tops of the vertical central posts and thelever, turning thetoothbars to the required backward angle, their smooth rounded endsturning readily in the loose collars C, as will be readily understood;and when the teeth are at the required incli nation the spring-actuatedlever is released IOO and allowed to engage with the registeringnotch inthe rear end of the adj Listing-bar. To incline theharrow-tcetl1rforward, the lever is pulled backward.

It will be seen that by means of the springactuated catch J engagingwith the notches l2 in the rear end of the bar I the harrow may bereadily secured in its adjustedl position, while by removing the rearend of the rod which connects thelever to thelast of the verticalcentral posts on the tooth-bars from one to the other of the series oftransverse apertures H in the lever a nice adjustment of the angle atwhich it is desired to secure the toothbars can be eiiected. Byproviding the ends of the tooth-bars with the tight metal bands, and theloose metal collars encircling the said bands and connected by thecoupling-rods E, the bars can turn smoothly and with little frictionwhen moved by the lever H, and there will be no danger of their bindingor sticking.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

The combination, in a harrow, of a series of beams secured at their endswithin loops and having an uprightfsecured to the middle portion of eachbeam, the rear upright being longer than the others, and having a seriesof holes at its lower portion and a spring-catch secured to its upperportion, links connecting the tops of the uprights with each other andwith the longer upright, and a brace-rod having a series of notches uponits rear portion, and having its front end bifurcated and eachbifurcated portion pivotally connected with the front beam, as shown anddescribed.

WILLTAM s. A. GRAHAM.

ln presence of- CHAs. N. GRAHAM, WM. A. MATHEWS.

